What is the legal test for intervening in a personal injury action?

Under Rule 24(a)(2), a party may intervene in a case if (1) it makes a timely motion; (2) it has an interest relating to the property or transaction which is the subject of the action; (3) the disposition of the action may impair or impede the applicant's ability to protect that interest; and (4) its interest is not adequately represented by the existing parties in the suit. Yorkshire, 26 F.3d at 944; Greene v. United States, 996 F.2d 973, 976 (9th Cir.1993). We construe these requirements broadly in favor of applicants for intervention. Yorkshire, 26 F.3d at 944.